gamma ray detector

effect:

Gamma ray detector An instrument used to detect gamma rays. Its main functions include:
1. Auxiliary monitoring of radioactive materials: Gamma ray detectors can monitor gamma rays produced by radioactive materials and are used to assist in the monitoring of radioactive materials.
2. Environmental radiation monitoring: Gamma ray detectors can be used for radiation monitoring in the environment, such as radiation in the air, radiation on the ground, etc.
3. Medical diagnosis: Gamma ray detectors can be used for medical diagnosis, such as scanning and diagnosis of radionuclides.
4. Industrial application: Gamma ray detectors can be used for quality inspection and testing in industry, such as detecting the density and defects of materials.

principle:

Gamma ray detector An instrument used to detect and measure gamma rays. It is based on the interaction mechanism of gamma rays, uses detectors to measure and count the energy of gamma rays, and finally obtains the gamma ray energy spectrum.
GRS is mainly composed of detectors, amplifiers, multi-channel analyzers and data acquisition systems. Its working principle can be summarized as the following steps:
1. Gamma rays are absorbed or scattered by matter: When gamma rays enter the matter, they will interact with the nuclei or electrons in the matter. Among them, the main interaction processes include Compton scattering, photoelectric effect, electron-positron pair generation and electron annihilation of gamma rays.
2. The detector measures gamma ray energy: The detector usually uses a silicon detector or a high-purity germanium detector. When gamma rays interact with a detector, they create charges or electron-hole pairs, which produce an electrical signal. This electrical signal can be amplified by an amplifier, then digitized and energy scaled by a multi-channel analyzer, and finally the energy information of the gamma rays is obtained.
3. Data acquisition and analysis: The multi-channel analyzer can store the energy spectrum of gamma rays and perform subsequent analysis and processing through a computer. By measuring and analyzing parameters such as peak position, peak area and shape of the energy spectrum, the energy carried by gamma rays and the corresponding radionuclides can be determined.
In general, the gamma ray detector uses the detector to measure and count the energy of gamma rays. Through the digitization and energy scale of the multi-channel analyzer, the energy spectrum of the gamma ray is finally obtained, and subsequent analysis can be performed by a computer. deal with. This analytical information can be used to determine the composition and radionuclide content of the detected material.